

PASSAT
PROGRAM FOR STRENGTH AND STABILITY CALCULATION OF VESSELS AND APPARATUSES
The Version 
The List of Changes 
2.13.0.1 14.11.2017 
BASIC module:
 We have fixed a model scaling to the screen size;
 We have added check of applicability of calculation procedure for landing pads (b3/Dp ratio);
 Calculation of saddle supports was not shown in the rtfreport. Fixed.
 We have fixed a problem with calculation of steep conical head (calculation of leaf node did not see" hydrostatic pressure component).
 We have fixed rounding of values in the filling calculation table.
 Under certain conditions, a hole for a nozzle in the flat cover could not be created; fixed.
"PASSATHEAT EXCHANGERS" module:
 We have fixed misprints in the Englishlanguage report of the floating head as per ASME.

2.13.0.0 30.10.2017 
MAIN new features:
 Calculation of the following shellandtube heat exchangers according to ASME VIII1, section UHX, has been added:
 With fixed tube sheets;
 With Ushaped tubes;
 With floating heads (type A, as per fig UHX14.1, submerged heads);
 With expansion joins (EJ calculation has been implemented according to ASME VIII1á MANDATORY APPENDIX 26);
 For vertical tanks, option "Calculation as per GOST 313852016 + STOSA03002200 has been added;
 For flange joints, option "Equal tightening" has been added, allowing a single (maximum) bolting load to be used for all flange operating conditions (assembly, operating conditions, testing);
BASIC module:
 For flange joins, option "Rearrange has been added for malefemale rearranging;
 Materials as per GB 150.2 (China), EN 10269 (bolts) have been added to standard material database;
 When selecting a bolt material, templates "Bar" and "Rod" are now available;
 Now it is possible to connect elements to the inside part of setthrough nozzles;
 Standard product base has been updated, and now it includes gaskets according to TR 5728006939782012008 (PUTG), TR 5728013939782012008 (PUTGm), OST 26.260.46199, GOST R 535612009, pipes and negative allowances as per EN 102161;
 Multithreading of geometric kernel has been implemented as a tunable parameter, which allows eliminating errors in the construction in some cases.
 In the dialog of selection of standard detachable covers, selection of pipe parameters has been added (similarly to the flange);
 For materials as per EN, feature "Casting control" for calculation of factor ??has been added;
 For heat insulation, option "Presents in assembling conditions has been added (now it can be switched off);
 Calculation of loads on the foundation for saddle supports has been added;
 For material 16GS at a temperature above 420 °C, a reduction factor hasnt been taken into consideration for the service life up to 2x105 h; fixed;
 We have fixed a problem with selection of casting materials as per ASME (for some materials, the database threw an error message);
 We have changed calculation of allowable stresses as follows: Earlier, the table [?] had priority over {Re/nT; Rm/nB }; now both options are considered, and the minimum result is selected;
 We have fixed an error concerning joint selection of detachable covers with flanges in accordance with new GOSTs.
"PASSATHEAT EXCHANGERS" module:
 Transitional shell is now implemented as option for all types of tube sheets;
 We have added a possibility to take into consideration the twosided coating of tube sheets;
 We have added a possibility to install the second expander (collector) in the heat exchanger with fixed tube sheets;
 For heat exchangers of air cooling unit (ACU), when making test pressure calculations, pipe materials are now taken into consideration;
 For heat exchangers of air cooling unit (ACU), coating of walls of welded chambers is now taken into consideration;
"PASSATCOLUMNS" module:
 For service platform, now it is possible to specify material and weight of steel structures;
 Now you can place a skirt support on the end of the shell.
"PASSATTANKS" module:
 Calculation of total load on the foundation (wall+head) has been added;
 Material of anchors ("bar chairs), for material intensity calculation, has been added;
 Insulation is now displayed on the wall and roof.

2.12.0.3 23.03.2017 
BASIC module:
 Hydrostatic pressure is not considered for some types of flat heads. Fixed.
 At calculation of some nozzle configurations as per ASME, File not found message has been displayed. Fixed.
 Loads on nozzle in automatic calculation mode have been always calculated in tiein points (in excess). Fixed.
 We have deleted redundant check of spherical head beading as per ASME, when there is no beading.
 We have considered Amendments No. 1 to RD 260114984 (calculations of jackets from longitudinal semipipes).
 Axial force sign has been considered wrongly at calculation of flange joint loads. Fixed.
"PASSATHEAT EXCHANGERS" module:
 We have fixed errors in delineation of some configurations of tube sheets.
 Check sp >= h for welded tube sheet is now removed.

2.10.0.1 25.01.2017 
BASIC module:
 We have introduced changes in database of standard saddle supports as per OST 26209193 (width of foundation plate and distance between the anchor bolts).
 We have fixed problems with data checking at joining of detachable covers to the conical transitions.
 We have fixed creation of ring support on the conical shell.
"PASSATHEAT EXCHANGERS" module:
 We have fixed problem with fixation of heat exchanger models, due to which in version 2.12 it was impossible to create loading diagrams.
 In dialog with tube sheet data, we fixed overlapped cells s_{p}, s_{pn}.
 At calculation of heat exchanger flange with Ushaped tubes and weldedin sheet, the pressure was taken as max{p_{ì}; p_{ò}}, but it should be taken as tube pressure. Fixed.
 For heat exchangers with fixed grids and air cooling unit (ACU), we have added an option Number of startstop cycles for calculation of tube welding.
 Misprint in calculation of ACU screw plugs is now corrected.
"PASSATSEISMIC (SEISMIKA)" module:
 Calculation of convective mass oscillation period is now fixed.

2.12 10.01.2017 
BASIC module:
 New elements were added:
 Jacket with longitudinal pipes, with calculation as per RD 260114984;
 Ring support of vertical vessel, with calculation as per Henry H.Bednar, "Pressure Vessel Design Handbook";
 Group of stiffening rings;
 Distributed external load.
 We have added calculation of number of the following elements with consideration for cladding layer, as per i. 8.8 GOST R 52857.1:
 Cylindrical shells;
 Conical transitions;
 Dished welded heads;
 Flat heads without ribs;
 Detachable covers;
 Cutins;
 Bends;
 Heat exchanger shells;
 Heat exchanger shells;
 Material consumption calculation table is now available.
 Creation of heat insulation in flanges and detachable covers has been added.
 Development of epures and diagrams has been improved.
 Updated interface now includes the following improvements:
 New button "Show heat insulation" has been added.
 We have developed new, stretching lists of elements for editing, deleting and transferring to Word;
 We have improved behaviour of the structure tree (when changing model, states of minimized branches are saved);
 O We have improved behaviour of lists of elements for editing (when updating the model, a cursor does not run to the first element);
 We have added a panel "Use of materials" with express assessment of material consumption and designation of colors of materials used in construction;
 We have added a button "Painting per materials", which includes a color mode with painting (filling), in accordance with panel "Use of materials.
 A new option switching off export of heat insulation, lining and fastening has been added.
 We have added two (2) variants of formula for stiffness parameters of the flanges with and without corrosion (selected by user).
 We have added an option Stiffening ring" at the less diameter of conical transition.
 Now ASME calculations include allowances c1, c2, c3.
 We have added a possibility of flanged olet placing on torispherical head.
 Database now includes new steels 20ȚŚ, 20ÊÀ, 09ĂŃÍÁÖ (20 JuCh, 20 KA, 09GSNBTs).
"PASSATHEAT EXCHANGERS" module:
 An interactive design of tube sheets is now available.
 All shell and tube heat exchangers with fixed sheets are combined in the single element, expansion joints and expanders are added as options.
 Additional check of stiffness of tube sheets is of advisory nature.
"PASSATCOLUMNS" module:
 We have added variant of supporting node with knee plates as per RTM 2611172.

2.11.0.5 25.11.2016 
BASIC module:
 A slow algorithm for spiral channel creation is now fixed.
 In some cases, weight of the jacket spiral channel was calculated incorrectly. Fixed.
 We have added checks for selfintersection of the spiral channel of jacket.
 We have fixed creation of stiffening ribs on the flat head, when the ribs are above the central weldolet.
 Doubling of flexibility formula of gasket within flange joints is now removed.
 We have added calculation of elliptic crosswalls, in case the sign "Presence of tests" is indicated at least on the one side (earlier the calculation was performed only if the sign was indicated on both sides).

2.11.0.4 25.11.2016 
"PASSATTanks" module:
 In calculation of the tank elements barycentre, there was a bug starting from version 2.11. Fixed.

2.11.0.3 23.11.2016 
BASIC Module:
 Model rebuilding algorithm has been improved (earlier in yellow and green modes there were different calculation results for elements masses).
 We have fixed bugs in calculation of nozzle according to ASME VIIII (allowance for corrosion as per UG16(b), thickness as per UG45).
 We have fixed a problem with opening some files of the previous version.
 We have unlocked calculation of austenitic steels in corrosion environment, by agreement with developers of GOST R 528572007.
 There was no option of calculation of the small end of conical transition as per ASME VIII1. Fixed.
 In calculation of conical transition as per ASME VIII1, a note UG32 (g) is now considered.
 At calculation of elements according to WRC 537 (107), calculation was interrupted, if breaking point of material at high temperature wasn't specified. Fixed (breaking point at 20 ?C is taken).
"PASSATCOLUMNS" module:
 Total allowance of the supporting ring wasnt used in calculation (total allowance of the supporting shell was taken instead of it). Fixed.

2.11.0.1 27.09.2016 
BASIC Module:
 Program failure, while attempting to select a flange from database in English mode, has been fixed.
 Misprints in symbols of nozzle welds (ï3) are corrected.
 In some cases, selection of negative allowance for plates wasnât available. Fixed.
 For material SA312 TP321 (welded pipe), allowable stresses were not taken from database. Fixed.
 At calculation of some types of flanged olets, the report included symbols ##, and an excess message about the unfound file was displayed. Fixed.
 Formulas in calculation of saddle support as per ASME were not displayed. Fixed.
"PASSATHEAT EXCHANGERS" module:
 For heat exchangers of air cooling unit (ACU), there was no automatic calculation of the number of tubes at the pitch change. Fixed.

2.11 20.09.2016 
BASIC Module:
 Calculation of elements as per ASME VIII is implemented:
 Cylindrical shells from external loads;
 Cylindrical shells at locations of saddle supports;
 Cylindrical, Ujackets, spiral and register channels.
 For calculation of shells in places of load application, WRC 537 (replacing WRC 107) is implemented.
 New elements were added:
 Supporting lugs on the shell and head (with calculation as per WRC 537);
 Areas of connection with load (with calculation as per WRC 537), with possibility of load transferring to the supports;
 Fixing of the vessel at an arbitrary point.
 Calculation of weights and centres of gravity per the elements and for the vessel as a whole is implemented.
 Calculation of test pressure per elements is implemented.
 Help System has been improved; contextual fetching of the relevant sections from the dialogues has been implemented.
 Calculation of filling is reworked using geometric kernel functions. visual representation of filling as translucent volume of product is implemented.
 Standard element selection database has been improved:
 A common database for selection of pipes is created (ASME B36.10M2004, GOST 1070491, GOST 1848279, GOST 2029585, GOST 325282013, GOST 326275, GOST 332282015, GOST 49490 , GOST 55075, GOST 873278, GOST 873475, GOST 994081, GOST 994181);
 A flat steel database is created (GOST 1990474, GOST 1990374);
 Accordingly, selection of standard shells, tubes, coils, tubular steel structures, negative allowances have been updated;
 Combined selection of flanges and pipes is now implemented;
 Selection of negative allowances for heads, skirt elements and nozzles is added;
 Consideration for changes to GOST 332592015 (ISS 23.040.60) is now added.
 Selection of saddle support is now fixed (there was an error in thickness of the supporting plate).
 External loads can be now set for any nozzle, not only for the radial one (for transferring to the supports and exporting to âNozzleFEMâ).
 When creating necks, procedure limitations, instead of restrictions, are made as warnings.
 We have implemented a system for automatic backup and recovery of files, in the event of an abnormal termination of the program.
 Parameters Py, Dy for flange were cleared, when copyingpasting. Fixed.
 Now the program works faster: At group editing or deleting of elements, a rebuilding is performed for once only.
"PASSATHEAT EXCHANGERS" module:
 For air coolers, the following options are added:
 To specify individually the materials of the element walls;
 To specify individually the allowances, negative tolerances;
 To specify negative tolerances from database;
 Calculation of screw plugs with estimation of torque value is now added;
 Analytical model of type 3, as per RD RTM 261379, is now added;
 Calculation of holes in cast and stamped covers has been added.
 We have added calculation of cylindrical shells of columns vessels (towers) from influence of external loads as per PRESSURE VESSEL DESIGN HANDBOOKÂ», Henry H. Bednar.
"PASSATTanks" module:
 Option âSkylightâ for conical roof has been added.


2.10.07 16.09.2016 
BASIC Module:
 We have fixed problems, concerning geometric kernel with exporting to IGES format that have encountered in version 2.10.0.6.
 We have improved algorithm of developing of beaded tieins, for correct building of straight tees.
 Estimation of axial force for flanges in the mode of automatic calculation of loads is now fixed.
 Tube thickness check as per RD 2618889 has been abandoned for the tubes welded in the flat covers.
 We have fixed a calculation of value l_{1}, for calculation of the ring stiffness factor.
"PASSATHEAT EXCHANGERS" module:
 We have fixed a bug â when calculating heat exchanger including seismicity, a pressure set by user was changed (for insignificant value).


2.10.06 22.08.2016 
BASIC Module:
 Some nozzle configurations in version 2.10.0.5 were processed incorrectly, (led to considerable excess of period of free oscillations). Fixed.
 A restriction for one (1) saddle support is now removed (a user can set more).
 We have fixed a program behaviour, when opening file by doubleclicking (in the absence of the license, a user is advised to set up a key, and the program icon is displayed in the taskbar).
 At operation of detachable flat cover, calculation of the flange part is performed now (earlier the calculation hasnât been performed at all, in accordance with GOST R 52857.2).
"PASSATSEISMIC (SEISMIKA)" module:
 At seismic calculation of the flat detachable cover, symbols ## were displayed in the report. Fixed.


2.10.03 22.03.2016 
BASIC Module:
 Flanges as per GOST 332592015 have been added to database;
 We have fixed a problem with copying elements from one vessel to another â previously when copying, general data settings had been transferred together with the element;
 We have adjusted database for sight windows (wrong flange thickness was selected for one standard (typical) size);
 We have fixed a misprint in calculation of detachable flat cover (factor F, does not affect an accuracy of result);
 In the calculation of flat cover as per ASME, symbols [ĂĄ] have been changed to S;
 Error in calculating of flat cover as per ASME has been fixed (now allowable stresses are taken not at operating, but at tightening temperature);
 Gasket selection database operation has been adjusted (sometimes wrong sizes could be assigned, starting from version 2.10.0.1);
 Calculation of distance between the flange faces, when selecting oval gasket, has been improved;
 We have fixed selection of fasteners diameter, when defining manholes as per OST (previously hole diameter had been selected);
 Presentation of secondary stresses calculation as per ASME has been improved.
"PASSATHEAT EXCHANGERS" module:
 In the aircooling unit (ACU) chamber with separating walls, their thickness was not considered during calculation of distance to the last separation wall. Fixed.

2.10.02 14.03.2016 
BASIC Module:
 In version 2.10.0.1 a bug has been fixed, because of which a wrong Type/Grade was selected for material, not the one that was intended by a dropdown list of the database.

2.10.01 03.03.2016 
BASIC module:
 Material database operation has been improved (now material can be selected much faster);
 For nozzles, a new option âCalculation in corrosive environment as per RD 260262â is added (earlier calculation has been always performed automatically);
 For flanges, a new option âAllowance for loads as per David Mossâ at calculation according to ASME VIII1 has been added;
 Open format file has been amended by a new section with apparatus general data;
 When copying elements, copying of color attribute is now available;
 Fields âObject nameâ and âInstallation nameâ have been transferred from the general data dialog to boilerplate text filling at report generation. Parameters âOrder numberâ, âOrder nameâ. âCalculation numberâ, âOrganizationâ and âCityâ are now connected with the model file;
 Line deleting error in the userâs table of materials has been fixed;
 At the report output for flanges in the input data section, now corrosion allowance defined by user is always displayed (earlier the output has responded to check âMake allowance for corrosion at stiffness calculationâ, it has no influence to accuracy of calculation);
 Dimension of nominal pressure (PN) has been corrected in gasket database as per BS EN 1514;
 Value s_{1} has been corrected in flange database as per BS EN 1092, type 11;
"PASSATCOLUMNS" module:
 At calculation of supporting assembly, skirt properties have been calculated at the skirt temperature. Corrected, now properties are calculated at the temperature of supporting assembly;
"PASSATHEAT EXCHANGERS" module:
 Pipe grid displaying has been fixed, for s_{p} < h;
 For heat exchangers with Ushaped tubes and tube grids welded to flanges, parameters D_{B}, s_{pn} are added;
 Generation of summary table for heat exchangers with Ushaped tubes and floating heads has been also added.

2.10 15.02.2016 
BASIC module:
 Calculation of the following elements as per ASME VIII (2013) Div.1 is implemented:
 Cylindrical shells (smooth and reinforced by stiffening rings);
 Conical transitions with end fixing nodes;
 Dished heads (spherical, elliptic, toroidal, conical);
 Flat heads;
 Reinforcements of holes;
 Detachable covers (flat, spherical, elliptic);
 Calculation of combined flanges as per ASME VIII (2013) Div.1 / Div.2 is added.
 Standard element database is now extended as follows:
 Apparatus flanges as per ASME B16.47 are added;
 Spiral wounded gaskets (SWG) as per GOST R 523762005 are added;
 Bolts material properties as per ST TsKBA (Central Design Bureau Standard, CDBA) 0122005 are added;
 Anchor bolts properties as per GOST R 5127499 are added;
 Flange inside diameters from ASME are defined in accordance with ASME B 16.34 (Table A1);
 Database for selection of saddle supports has been improved.
 Report generator has been improved. Doubling of lines in summary tables is now removed;
 A new option, quick model rebuilding by means of OpenGL, is now available;
 When editing model, analysis of changes is now available; at the constant geometry, model rebuilding is not performed;
 When exporting solid model, merging of components in assemblies with names is now available;
 When exporting solid model, definition of details density parameter is now available;
 For new vessels, option "Exclude corrosion in test mode" has been added;
 Option of relocation of child elements in the model tree within the same hierarchical layer has been added;
 Many captions in dialogues were not displayed completely, fixed;
 Method of nozzles designation has been improved (assignment + label);
 Material database is physically divided into standard and user parts. This will allow saving the material library at the change of program version;
 At calculation of horizontal vessels on supports, calculation of reinforcement of conical elements hasnât been reported, now it is fixed.
"PASSATCOLUMNS" module:
 âFoundation anchorage" and âRigid weightless baseâ options are added.
"PASSATHEAT EXCHANGERS" module:
 Pressure calculation of expander is added.

  